Switch controlled electric



May 1, 1923. LMWfiW H. HERTZBEWG SWITCH CONTROLLED ELECTRIC APPLIANCEFilm March 9, 1922 Patented May 1, 192% UNITED PATENT OFFHZE.

HARRY HER'IZBERG. OF BIEZGOHLYN, NEVV' YORK, ASSIGNOR 10 MAGNUE;ELECQLRIG COMPANY, INC., A CORPORA'JTIUN OF NEW YORK.

SWITCH-CUNlIlEt'ULLED ELECIBIC APPLIANCE.

Application filed March 9. 3.922.

1/ all whom it may concern:

lie it known that I, Halter l-lnwivnncno, a

ci ten of the United Stateoi America residingg in the city of New.iorlc, borough oi li'ooklyn, county of Kin s and Fltate of:

New York, have invented certain new and useful in:provements inblwitclrtlontrolled l llectric iimiliances, of which the following is aspecification.

This invention. relates generally to switch controlled electricalappliances such as attachment plugs and has specific reference toswitches of the type particularly adapted to be used in connection with.such plugs.

15 An important object oi the invention to so construct and arrange thevarious elements embodied therein as to make possible the provision of acon'ipact andv durable device employing an improved form or switch whichis inexpensive to inarmiacture and reliable in operation.

Other objects of the invention and oertain advantages thereoffwillbecome apparent from the following description taken in connection withthe accompanying drawings in which:

lligure 1 is a plan view (it a switch plug embodying: my invention.

Figure 2 is a view showing}; in elevation the internal construction ofthe plug.

I Figure 3 is a transverse sectional view taken on line 3--3 of Figure2.

Figure 4 is a. longitudinal sectional view taken on line 4 4: of Figure2.

Figure 5 is a similar view to that of Fig ure 4; taken on line 5-5 ofFigure 2.

Fi ure 6 is a pers aective view of a recioo a p L rocating or circuitcloser o ieratinp; bar,

Figure 7 is a plan view illustrating the circuit closer as about to snapfrom opened to closed position. i

In the drawings wherein I have shown what I at present consider thepreferred form of my invention, the numeral 5 indicates a housing orcasing formed of suitable insulating material, the casing: being];composed of two similar sections 6 and 7 which are arranged in a face toface relation and held in position by means of screws or bolts 8 passedtransversely through the section. Each of the sections 6 and 7 is soformed or moulded as to provide registi i chamhers 9 and 10, withinwhich are arranged gripping contacts 11 and 12, which rcspew tivelycomprise resilient lingers 13 and let Serial No. 542,362.

to which are connected similar lingers 15 and 16. The sections 6 and 7are constructed to provide also a switch chamber 17 within which isarranged a snap switch ii'idicated as a whole by the i'iuineral 18.

The switch 18 comprises a base or switch block 19 formed from suitableinsulating material, to the upper face of which is secured a pair oi?resilient substantially U- shaped contact members 20 and 21. Theseresilient contact members are held in position respectively by means ofscrews and 33, the screw 22 being utilized to electrically connect thegripping contact 12 with the resilient contact 20, whereas the screw2,25

utilized to electrically connect the resilient contact 21 with arelatively short conductor 2d, the outer or tree end oi which is held inposition within the recess termed in the section 7 by means of a screw536. It will be noted that the gripping; con tact 11 is provided with anextension 27 which passes under the switch block 19 and terminateswithin the recess 28 formed in the section '7, the extension 27 beingsecured at its tree end to the section 7 by means of a screw 29. Thescrews 26 and 29 are adapted also to electrically connect the bared endsoi conductors 30 and 31 with the conductor 24: and the extension 27. Asameans for protecting the conductors 30 and ill there is provided theusual form of flexible coil 32 which is suitably held at one end betweenthe sections 6 and 7.

As a circuit closer operating means I employ a reciprocating bar 33which is adapted to operate in a transverse groove 34 formed in the base19. The bar 38 is provided at opposite ends with push buttons 35 whichextend through openings 36 formed in the sections 6 and 7 and-arcadapted to operate within recesses 37 formed in the base 19. Upon theupper face or edge or the bar 83 there is formed a lug 38 carrying acircuit closer in the form of a transversely disposed coil spring 39upon the ends of which are fitted a pair of contact points 40, the endsof which are tapered as shown in l igure 6. As a means for temporarilyrestraining the contact points against move ment as the bar 33 is movedin either direction, I provide a yoke a1 the ends or arms 42 of whichextend an appreciable dis-- tance above the uppertace oi. the block it).The yoli'e 4i is loosely arranged within a till jaw

groove 43 formed onv the undertace of the base 19 and is free toslightlyinove longitudinaliy in one direction or the other in order thatthe impinging effect of the contacts 40 upon the arms 42 thereof may beequalized to insure simultaneous engagement or disengagement between thecontacts 40 or the resilient contacts 20 and 21 when the bar 33 is movedin either one direction or the other.

With the various elements positioned as show in Figure 2, the circuit isclosed through resilient contacts 20 and 21 "by means of thetransversely disposed coil spring 39 which functions as a coi'iductorwhen the contacts 40 are electrically connected withthe resilientcontacts. By moving the bar 33 a'tension is set up within the spring 34tending tosever engagement of thecontacts 40 with the resilient contacts20 and 21 but such disengagement is prevented by" the upwardly extendingarms 42 until the bar 33 has moved a sufiicient distance to enablethecontacts 40 to freely pass the retarding arms 42. As soon as thespring 39 has been distortionedsufliciently to permit disengagement ofthe contacts .40 with the arms 42, the contacts by reason of the tensionmaintained within the spring 39 are quickly snapped from engagement withthe resilient contacts 20 and21 thus opening the circuit therebetween.With the circuit open and the contacts'40 now located upon the oppositesides of the arms 42 the resilient contacts 2 0 and "21 may be placed inelectrical connection with each other by a quick snap action of thespring 39 when the bar 33 is moved in anopposite direction a suflicientdistance to enable the contacts 40 to freely pass the upwardlyprojecting arms 42.

' Having thus described my invention, I claim: v

1'. In an electrical appliance, a pair of contacts, a movable circuitcloser carrying element, a circuit closer carried by said element andadapted to be moved bodily therewith tewar d said contacts, and meanslying in the path of travel of said closer for restraining the ends ofthe same against moveinent while said element is being moved apredetermined distance, the ends of said closerbeing released uponcontinued movement of said element and thereafter snapped intoelectrical connection with said contacts.

2. In an electrical appliance, a pair of contacts, a movable circuitcloser carrying element, a resilient circuit closer adapted to be novedbodily by said element to ward said contacts, and means lying in thepath oftravel of saidcloser for restraining the ends of the same againstmovement while said element is being moved a predetermined distance, theends of said closer being released upon continued movement of saidelement and thereafter snapped into electrical connection with saidcontacts.

3. In an electrical appliance, a pair of contacts, a reciprocatingcircuit closer operating element, a circuit closer carried by saidoperatingelement, said closer being in the form of a spring adapted tobe moved bodily toward said contacts b said operating element upon acorrespon ing movement of the same, and means lying in the path oftravel of said closer for restraining the ends of the same againstmovement while said operating element is being moved a predetermineddistance, the ends of said closer being released upon continued movementof said operating element and thereafter snapped into electricalconnection with said contacts.

4. In an electrical appliance, a pair of contacts having resilientarms,a movable circuit closer operating element, a resilient circuitcloser carried by said element and adapted to be moved bodily therewithtoward said contacts, and means lying in the path of travel ofsaidcloser for restraining the ends of the same against movement whilesaid operating element is being moved a predetermined distance. the endsof said closer being release u continued movement of said operatingelement, and thereafter snapped into electrical connection with theresilient arms of said contacts. i

5. In an electrical appliance, a pair of contacts, a movablecircuit'closer operating element, a circuit closer carried by saidoperating element and adapted to be moved bodily therewith, said closerbeing in the form of a coil spring, contacts carried at the oppositeends of said spring, and means lying in" the path of travel (if saidcloser for restraining the second named contacts against movement whilesaid o} erating element is being moved a predetermined distance thesecond named contacts being released upon eontinued movement of said operating element and thereafter snapped into electrical connection withthe first mentioned contacts.

6. In an electrical appliance. a base, a reciprocating closer operatingelement, a pair of contacts, a resilient circuit closer carried by saidopera-ting element and adapted to he moved bodily therewith toward saidcontacts when said element is moved in a cprresponding direction, a yokehaving arms lying in the path of travel of said closer for restrainingthe ends of the same against movement while said operating element isbeing moved a predetermined distance, the ends of said closer beingreleased from said arms upon continued movementof said op eratingelement and thereafter snapped into electrical connection with saidcontacts.

'7. In an electrical appliance, a contact, a movable closer operatingelement, a circuit closer carried by said element and adapted to bemoved bodily therewith toward said contact, and means lying in the pathof travel of said closer for restraining an end of the same againstmovement while said operating element is being moved a predetermineddistance, the end of said closer being released upon continued movementof said operating element and thereafter snapped into electricalconnection with said contact.

8. in an electrical. appliance, a pair of contacts, a reciprocatingcloser operating element, a resilient circuit closer carried by saidelement and adapted to be moved bodily therewith toward said contacts,movable means lying); in the path of travel of said closer forrestraining); the ends of the same against movement while said operatingele-- mentis being moved a predetermined distance, the ends of saidcloser being released upon continued movement of said operating elementand thereafter snapped into elec trical connection with said contacts.

9. In an electrical appliance, a pair of contacts, a circuit closeroperating element, a closer carried by said element, said closer beingin the form of a coil spring attached to said element and adapted to bemoved bodily therewith toward said contacts, and means lying in the pathof travel of said closer for engaging and retaining the ends thereof ina given position during a predetermined movement of said element,whereby tension is set up within said closer, the ends of said closerbeing released upon con-- tinued movement oi said operating element andthereafter snapped into electrical connection with said contacts by thetension set up within said spring.

10. In an electrical appliance, a pair of contacts, a reciprocatingcircuit closer operating element having a lug carried, there by, acircuit closer in the form of a spring passed through said lug andadapted to be moved bodily with said operating element toward saidcontacts upon a corresponding movement of said operating elen'ient, andmovable means lying in the path of travel of said closer for engagingand retaining the ends of said spring against movement while saidoperating element is being moved a predetermined distance, the ends ofsaid spring being;- released upon continued movement of said operatingelement and thereafter snapped into electrical connection with saidcontacts.

In testimony whereof, I have aflixed my signature to this specification.

HARRY HERTZBERG.

Ill)

